* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
}

.content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    background: white;
    min-height: 100vh;
}

/* 头部样式 */
.header {
    text-align: center;
    margin-bottom: 3rem;
    padding: 2rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 12px;
}

.header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.subtitle {
    font-size: 1.2rem;
    opacity: 0.9;
}

/* 语言切换器样式 */
.language-switcher {
    background: #f8f9fa;
    padding: 1.5rem;
    border-radius: 8px;
    margin-bottom: 2rem;
    border: 1px solid #e9ecef;
}

.language-switcher h2 {
    margin-bottom: 1rem;
    color: #495057;
}

.lang-buttons {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

.lang-buttons button {
    padding: 0.75rem 1.5rem;
    border: 2px solid #007bff;
    background: white;
    color: #007bff;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s ease;
}

.lang-buttons button:hover {
    background: #007bff;
    color: white;
}

.lang-buttons button.active {
    background: #007bff;
    color: white;
}

/* 测试区域样式 */
.test-section {
    margin-bottom: 2.5rem;
    padding: 1.5rem;
    border: 1px solid #e9ecef;
    border-radius: 8px;
    background: white;
}

.test-section h2 {
    color: #495057;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid #007bff;
}

.test-section h3 {
    color: #6c757d;
    margin-bottom: 0.75rem;
}

.test-content {
    padding: 1rem 0;
}

.test-content p {
    margin-bottom: 0.75rem;
    line-height: 1.6;
}

.test-content ul {
    margin-left: 1.5rem;
    margin-bottom: 1rem;
}

.test-content li {
    margin-bottom: 0.5rem;
}

/* 输入框和按钮样式 */
input[type='text'] {
    padding: 0.75rem;
    border: 1px solid #ced4da;
    border-radius: 4px;
    margin-right: 1rem;
    margin-bottom: 0.5rem;
    font-size: 1rem;
    width: 200px;
}

button {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    margin-right: 0.5rem;
    margin-bottom: 0.5rem;
    transition: all 0.3s ease;
}

button:not(.primary):not(.secondary):not(.lang-buttons button) {
    background: #007bff;
    color: white;
}

button:not(.primary):not(.secondary):not(.lang-buttons button):hover {
    background: #0056b3;
}

.primary {
    background: #28a745;
    color: white;
}

.primary:hover {
    background: #1e7e34;
}

.secondary {
    background: #6c757d;
    color: white;
}

.secondary:hover {
    background: #545b62;
}

/* 卡片样式 */
.card {
    background: #f8f9fa;
    padding: 1.5rem;
    border-radius: 8px;
    border: 1px solid #e9ecef;
}

.card h3 {
    margin-bottom: 1rem;
    color: #495057;
}

.card p {
    margin-bottom: 1.5rem;
    color: #6c757d;
}

.actions {
    display: flex;
    gap: 1rem;
}

/* 页脚样式 */
.footer {
    margin-top: 3rem;
    padding: 1.5rem;
    background: #343a40;
    color: white;
    border-radius: 8px;
    text-align: center;
}

.footer p {
    margin-bottom: 0.5rem;
    opacity: 0.9;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .content {
        padding: 1rem;
    }

    .header h1 {
        font-size: 2rem;
    }

    .lang-buttons {
        flex-direction: column;
    }

    .actions {
        flex-direction: column;
    }

    input[type='text'] {
        width: 100%;
        margin-right: 0;
    }
}
